Reinforcing strip



Dec. 1, 1942. w s w I 2,303,777

' REINFORCING STRIP Filed June 28, 1940 I INVENTOR. NHTHHN WHFFEHHW' ATTORNEYS- Patented Dec. 1, 1942 REINFORGING STRIP Nathan Warshaw, Brooklyn, N. Y., assignor to Atlantic Gummed Paper Corporation, a corporation of New York Application June 28, 1940, Serial No. 342,943

5 Claims.

This invention relates to reinforcing stays or strips commonly used as box stays and for sealing boxes, cartons and the like.

An object is to provide an improved strip of the character described having great strength by reason of a reinforcing thread or strand carried by the strip and secured by ears or tabs therein.

Another object is to provide a strip of the character described in which each transverse section of the reinforcing strand is securely anunderstood, however, that this embodiment is merely illustrative and in no wise restrictive reference being made to the appended claims which define the scope of the invention. In the acccmpanying drawing,

Figure 1 is a fragmentary plan front view of a strip embodying the invention.

Figure 2 is a rear view of the strip Figure 1.

Figure 3 is a perspective view of the first or base sheet of the strip Figure 1.

Figure 4 is a sectional view on the line 4-4, Figure 1 showing sheet if: ready to be applied to the base member lil.

Figures 5, 6, and '7 are plan views of alternate forms of base members that may be used in place of the base member shown in the preceding figures.

Referring to Figure 1the numeral Iii denotes a base member, strip or sheet of any desired dimensions. Such a strip may, for the sake of illustration be 3" wide and of any suitable material such as paper. This paper may be of any suitable thickness and kind, and may have woven therein or attached thereto, by any suitable adhesive, reinforcing threads or fibres, or it may be made of two thicknesses of paper cemented together with the grain or ply of one thickness transverse to that of the other. By way of illustration, the strip Ill herewith described is a single thickness of ordinary tough paper such as commonly used for box stays.

This strip 10 has the ears ll punched therein so that corresponding openings, one of which is indicated by the numeral l2 are formed in the strip.

The lower edge of each earfor example H- is on a transverse line with the upper edge of the next ear belowlla-so that the reinforcing thread or strand l3 extends straight across the strip, and the center loop-s l4 thereof are not disposed diagonally there across.

The strand l3 may be any suitable spun, twisted or braided thread, or it may be metallic. It is applied to the strip by suitable machinery and where looped around each ear is drawn tightly there against so as to eliminate as far as possible any slack.

From Figure 2 it will be seen how the strand 13 extends over the under side of each ear, and therefore how each loopl3a, thereof is anchored to the strip 10 at each end on the rear side of the strip.

The rear surface [0a of the strip It may be coated with adhesive and the loops l3a are thereby attached to the under side of the ears II. Likewise the front face lflb may be coated with adhesive and the transverse sections I4 of the strand imbedded therein. By the foregoing arrangement, all of the strand I3 is securely attached to the strip 10 and because it is looped around the ears I l therein it cannot be displaced, but each transverse section thereof is rigidly held in position.

It will be seen that the strand l3 has portions on the back of sheet HI extending longitudinally thereof and portions (I4) lying across the face of the sheet transverse thereof. These portions of the strand are therefore at an angle to each other.

A cover member or sheet l5 which may have adhesive on the inside surface I511, is laid over the face of the base sheet 10 as shown in Figure 1, and pressed thereto. This pressing operation forces the strand l3 into the sheets l0 and I5 and imbeds it therein and also presses the ears ll into the openings I2 from whence they came. This results in a smooth pliable composite reinforcing strip having great strength and the ability to resist longitudinal and transverse strains and tears.

A feature of importance is to mechanically secure the reinforcing strand l3 to the base member independently of the adhesive; this can be accomplished in many ways, only tw f hi h are here shown as illustrative.

Obviously both sides of the sheet Ii] can be covered by cover sheets like I5, which may be of any desired kind of paper or cloth, or one .the strip or transverse thereto.

side may be paper covered and the other cloth covered.

It is highly desirable that a strip of this character resist longitudinal strains and tears occurring in the direction of the arrow l6, Figure 2. In such strips where the reinforcing means corresponding to the strand l3 just disclosed is composed of a plurality of unspun fibres laid transversely of the strip, or where a strand or' cord is disposed along the surface of the base sheet 10 in zigzag fashion and merely secured thereto by the adhesive thereon, it is obvious that a tear occurring longitudinally of the strip will encounter one of the transverse portions of the strand which can draw in the adhesive, thereby permitting the tear to progress. In other words the reinforcement is only as good as the adhesive holding it will permit, and as such adhesives often soften in the presence of heat or moisture, such reinforcement may not prove satisfactory and lasting.

By the present invention, however, the reinforcing strand is firmly held not only by the adhesive but also by the ears I l and the chance that it will draw in the adhesive is greatly reduced, and its holding power and resistance to tear greatly increased. The sheets Ill and I5 may be of any suitable material and if of paper, may be pre-crinkled or corrugated, and the crinkles or corrugations may run lengthwise of Strips of such special papers may be given nearly any desired characteristics, such as the ability to stretch longitudinally or laterally, or considerable general flexibility. All such modifications, however,

7 may embody the ears I l and the other constructional details disclosed herein whereby an improved strip article'of manufacture is produced.

In Figure 5 is shown an alternate form of base strip or member. Here the numeral ll denotes a strip having the extending ears l8 corresponding to the ears I E, Figure 1, formed in the edges of the strip instead of being punched therein as previously described. In this form of construction the strand i3 may be laced across the strip from ear to ear as previously described.

As shown in Figure 6, instead of the extended I ears, notches l9 extending inwardly of the strip 20 may be used to hold the strand at the edges of the strip.

As shown in Figure 7, the strand l3 may be Wound around the strip 2| so as to alternately cross the front and back thereof, the notches 22 in the strip preventing lateral shifting of the strand under strain.

It will be understood that when the word adhesive is used herein it means any suitable material such as asphalt, rubber cement, watersoluble glues, pastes and the like, and that different adhesives may be used in the same strip. For example, the sheets l0 and 15 with the strand l3 therebetween may be secured together with a hot, waterproof cement, and there one or both outside surfaces of the strip may be coated with a water-soluble adhesive whereby the strip is secured in place on a carton or the like.

What is claimed is:

1. A stay strip comprising a base member having a row of ears formed therein adjacent each side of said strip, a continuous reinforcing strand laced across said ears whereby said strand extends from side to side of said member and overlies the face of same between said ears, said strand extending longitudinally below each of said ears to the rear of said strip and a cover member secured to the face of said strip.

2. A stay strip comprising a base member having a plurality of ears formed therein adjacent the sides of said member, the bottom edge of each car on one side of said member being aligned transversely with the top edge of the following ear on the opposite side of said member, a continuous reinforcing strand laced across said ears whereby portions thereof extend laterally across said member, and a cover member secured to and overlying theface of said base member.

3. An improved article of manufacture comprising a strip of paper having rows of ears, and a continuous reinforcing strand supported thereon by engagement with said ears, said strand having portions extending transversely of said strip and further secured thereto by adhesive.

4. An improved article of manufacture comprising a strip of paper having a continuous reinforcing strand mechanically secured thereto by means integral with said strip comprising ears formed integral with said strip, said strand having portions extending transversely of said strip and other portions extending longitudinally thereof.

5. A stay strip comprising a base member having spaced apart rows of ears formed therein, said rows extending longitudinally of said member, a continuous reinforcing strand extending from side to side of said base member across the face thereof and passing around all of said ears, whereby those portions of said strand embraced by said ears are held in position below the plane of the face of said base member, and a cover member overlying the face of said base member and said strand and secured thereto.

NATHAN WARSHAW. 

